How to maintain and extend the life of UV printer nozzles?
How to maintain and extend the life of UV printer nozzles? The nozzle is a very important part of UV printer equipment. The quality of the nozzle directly affects the operating efficiency and printing quality of UV printer equipment. At the same time, it is very fragile as a very delicate component. In long-term use, we How to maintain the print head to extend the life of the UV print head? Carle below share some maintenance tips for everyone.
First: Ink quality is not good enough, which will cause nozzle clogging
Some customers feel that the cost of the inks provided by the company is too high when using UV printers, and they have replaced some inks that are not of high quality. These inks often cause the filter to be gradually blocked due to quality problems, causing damage to the ink pump and even some ink Factors can pass through the filter, causing permanent blockage of the ink head, causing serious damage to the ink head
Second: the impact of rapid changes in temperature and humidity on the print head and ink
The temperature and humidity of the Uv printer environment plays a decisive role in the normal use of ink. If the temperature is too high or too low, the viscosity of the ink will drop or increase a lot, thus breaking the original state of the ink. As a result, the phenomenon of frequent disconnection and even sprayed out images appeared during the printing process.
On the other hand, if the ambient humidity is too low and the temperature is relatively high, the ink volatility will increase, and the ink will easily dry and form a solid on the surface of the nozzle, which will affect the normal operation of the nozzle. If the humidity is too high, ink may accumulate around the nozzle holes, which will affect the nozzle work, and the picture is not easy to dry. Therefore, pay attention to changes in temperature and humidity at any time. The temperature of the production workshop should not change more than 3-5 degrees in a day.
Third: Ink viscosity is too high
Excessive ink viscosity will cause the ink to stick in the ink delivery tube, resulting in insufficient ink supply, insufficient ink volume, and color breakage. Especially in winter, the temperature is low, this phenomenon is more prominent.
Solution: Increase the indoor temperature (such as turning on the air conditioner, using a dryer, etc.) to reduce the viscosity of the ink. Or use a lower viscosity ink.
Fourth: the influence of the voltage of the nozzle on the nozzle
The voltage of the print head can determine the degree of bending of the piezoelectricity inside the print head, so the high voltage can also increase the amount, and the lower the better without affecting the picture quality. Practice has proved that voltages exceeding 32V may encounter frequent ink cut-offs and reduced service life. Too low nozzle working voltage will affect the saturation of the screen, so prevent the nozzles from being damaged. 28V-32V The working voltage between the nozzles is more suitable.
Fifth: the impact of static electricity
During the printing process, a large amount of static electricity is generated due to the friction between the printing material and the feed roller. If it cannot be eliminated in time, it will easily affect the normal work of the nozzle. For example, ink droplets are sufficiently affected by static electricity to deviate from their trajectories, resulting in scatter and flying ink on the screen. If the static electricity is too large, the nozzles may be damaged, and computer equipment is prone to garbled characters and crashes under the influence of high static electricity, and even the circuit board of the machine is burned. Therefore, it is extremely important to take correct and effective measures to eliminate the static electricity generated by the equipment. Grounding is a good way to eliminate static electricity.